On 14 May 1856, Charles Darwin recorded in his journal that, on the advice of his friend Charles Lyell, after almost 20 years exploring the subject, he had finally begun writing a ‘sketch’ of his ideas on species.

To mark Charles Darwin’s 211th birthday, some thoughts on his 1871 classic, The Descent of Man, and Selection in Relation to Sex, an unlikely anecdote about a snail, plus all the usual book reviews and links to Darwin-related news stories.